#define  _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
using namespace std;
namespace bit
{
	typedef char* iterator;
	class string
	{
		
	public:
		string();
		string(const char* str);
		~string();
		iterator begin();
		iterator end();
		const char* c_str() const
		{
			return _str;
		}
	private:
		char* _str;
		size_t _size;
		size_t _capacity;
	};
}
